191803973461 has 2 divisors, whose sum is σ = 191803973462. Its totient is φ = 191803973460.

The previous prime is 191803973453. The next prime is 191803973467. The reversal of 191803973461 is 164379308191.

191803973461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168580042225 + 23223931236 = 410585^2 + 152394^2 .

It is a cyclic number.

It is not a de Polignac number, because 191803973461 - 2³ = 191803973453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191803973399 and 191803973408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191803973467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95901986730 + 95901986731.

It is an arithmetic number, because the mean of its divisors is an integer number (95901986731).

Almost surely, 2^191803973461 is an apocalyptic number.

It is an amenable number.

191803973461 is a deficient number, since it is larger than the sum of its proper divisors (1).

191803973461 is an equidigital number, since it uses as much as digits as its factorization.

191803973461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 191803973461 in words is "one hundred ninety-one billion, eight hundred three million, nine hundred seventy-three thousand, four hundred sixty-one".